1999 LAND ROVER DEFENDER low oil pressure

GENERAL SPECIFICATION DATA
1
INFORMATION ENGINE - Td5
Type 2.5 litre in-line direct injection Diesel, turbocharged.................................................................................
and intercooled
Number of cylinders 5 in-line, No. 1 cylinder at front of engine.........................................................
Bore 84.450 mm (3.3248 in).................................................................................
Stroke 88.950 mm (3.5020 in)...............................................................................
Capacity 2498 cm
3(152.5 in3) ...........................................................................
Firing order 1 - 2 - 4 - 5 - 3.......................................................................
Compression ratio 19.5:1............................................................
Direction of rotation Clockwise viewed from the front of the engine...........................................................
Dimensions
Length 766 mm (30.1 in).....................................................................
Width 708 mm (27.8 in).......................................................................
Height 788 mm (31.0 in)......................................................................
Emissions standard :-
Engine Serial No. Prefixes 10P to 14P - EU2 Model ECD 2........
Engine Serial No. Prefixes 15P to 19P - EU3 Model ECD 3........
Lubrication
Type Wet sump, pressure fed.................................................................................
Pump type Eccentric rotor, crankshaft driven integral with stiffener........................................................................
plate.
Filter type:
Primary Centrifuge filter....................................................................
Secondary Disposable canister with full flow by-pass...............................................................
Pressure at idle (cold) 3.0 bar (43.5 lbf.in
2) ......................................................
Pressure at 3500 rev/min (hot) 1.5 - 3.0 bar (21.75 - 43.5 lbf.in2) .........................................
Relief valve opening pressure 4.0 bar (58 lbf.in2) ..........................................
Low oil pressure switch opening pressure 0.2 - 0.6 bar (3.0 - 8.8 lbf.in2) .......................
Crankshaft
Main bearing journal diameter 61.9875 - 62.0125 mm..........................................
Crankpin journal diameter 53.99 - 54.01 mm................................................
Crankshaft end float 0.020 - 0.250 mm.........................................................
Main bearings
Number and type 6 half shells (5 main, 1 thrust)..............................................................
Pistons
Type Graphite compound skirt with combustion chamber in.................................................................................
crown.
Clearance in cylinder bore 0.172 - 0.206 mm (measured at bottom of skirt, 90°to ...............................................
gudgeon pin)
Diameter 84.270 - 85.254 mm (measured 90°to gudgeon pin, ..........................................................................
and 40.00 mm from bottom of skirt.)
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GENERAL FITTING REMINDERS
5
INFORMATION JOINTS AND JOINT FACES
1.Always use correct gaskets where they are
specified.
2.Use jointing compound only when
recommended. Otherwise fit joints dry.
3.When jointing compound is used, apply in a thin
uniform film to metal surfaces; take great care to
prevent it from entering oilways, pipes or blind
tapped holes.
4.Remove all traces of old jointing materials prior
to reassembly. Do not use a tool which could
damage joint faces.
5.Inspect joint faces for scratches or burrs and
remove with a fine file or oil stone; do not allow
removed material or dirt to enter tapped holes or
enclosed parts.
6.Blow out any pipes, channels or crevices with
compressed air, fit new’O’rings or seals
displaced by air blast.FLEXIBLE HYDRAULIC PIPES, HOSES
1.Before removing any brake or power steering
hose, clean end fittings and area surrounding
them as thoroughly as possible.
2.Obtain appropriate plugs or caps before
detaching hose end fittings, so that ports can be
immediately covered to exclude dirt.
3.Clean hose externally and blow through with
airline. Examine carefully for cracks, separation
of plies, security of end fittings and external
damage. Reject any hose found faulty.
4.When refitting hose, ensure that no unnecessary
bends are introduced, and that hose is not
twisted before or during tightening of union nuts.
5.Containers for hydraulic fluid must be kept
absolutely clean.
6.Do not store brake fluid in an unsealed
container. It will absorb water, and fluid in this
condition would be dangerous to use due to a
lowering of its boiling point.
7.Do not allow brake fluid to be contaminated with
mineral oil, or use a container which has
previously contained mineral oil.
8.Do not re-use brake fluid bled from system.
9.Always use clean brake fluid to clean hydraulic
components.
10.Fit a cap to seal a hydraulic union and a plug to
its socket after removal to prevent ingress of dirt.
11.Absolute cleanliness must be observed with
hydraulic components at all times.
12.After any work on hydraulic systems, inspect
carefully for leaks underneath the vehicle while a
second operator applies maximum pressure to
the brakes (engine running) and operates the
steering.
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10 - MAINTENANCE
CONTENTS
Page
MAINTENANCE
UNDERBONNET VIEW - Td5 1..............................................................................
SEATS AND SEAT BELTS 2..................................................................................
LAMPS, HORNS AND WARNING INDICATORS 2................................................
WIPERS AND WASHERS 3...................................................................................
HANDBRAKE 3.......................................................................................................
BATTERY CONDITION - Td5 4..............................................................................
HANDSET BATTERY 5...........................................................................................
HEADLAMP ALIGNMENT 5....................................................................................
ROAD WHEELS 6...................................................................................................
TYRE PRESSURES, CONDITION AND TREAD DEPTH 6....................................
BRAKE PADS, CALIPERS AND DISCS 7..............................................................
ROAD WHEEL SPEED SENSOR HARNESS - Td5 7............................................
FUEL FILTER ELEMENT 8.....................................................................................
FUEL FILTER SEDIMENTER - Td5 8.....................................................................
INTERCOOLER / COOLING SYSTEM 9................................................................
AMBIENT AIR PRESSURE (AAP) SENSOR - Td5 9..............................................
DOOR LOCKS AND HINGES 10............................................................................
ENGINE COOLANT 10...........................................................................................
BRAKE FLUID 11....................................................................................................
AIR FILTER ELEMENT AND DUMP VALVE 11.....................................................
AUXILIARY DRIVE BELT 12...................................................................................
PAS FLUID, CLUTCH FLUID AND SCREEN WASHER LEVELS 12.....................
STEERING BOX 13................................................................................................
ENGINE OIL 14.......................................................................................................
CENTRIFUGE ROTOR - Td5 14.............................................................................
FULL FLOW OIL FILTER 15...................................................................................
GEARBOX OIL 15...................................................................................................
TRANSFER BOX OIL 16.........................................................................................
FRONT AND REAR AXLE OIL 17..........................................................................
PROPELLER SHAFTS 18.......................................................................................
CLUTCH PIPES AND UNIONS 18..........................................................................
PAS PIPES AND UNIONS 19.................................................................................
ENGINE, GEARBOX, TRANSFER BOX AND AXLES 19.......................................
EXHAUST SYSTEM 20...........................................................................................
STEERING BOX AND SUSPENSION 20...............................................................
STEERING BALL JOINTS 21.................................................................................
SHOCK ABSORBERS 22.......................................................................................
TOWING BRACKET 22...........................................................................................
ENGINE AND TRANSMISSION MOUNTINGS 23..................................................
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MAINTENANCE
9
MAINTENANCE INTERCOOLER / COOLING SYSTEM
1.Visually check for any obstructions in the
radiator and intercooler matrix and remove
debris as necessary.
2.Visually check fan blades for damage.
3.Check cooling, intercooler and heating systems
for leaks, hoses and oil pipes for security and
condition.
4.Check accessible hose clips for tightness.
5.Check coolant level, top-up if necessary
Cooling System Top-Up
1.With engine cold, remove expansion tank filler
cap.
2.Top-up with recommended mixture of coolant
until level reaches mark on expansion tank.
3.Fit expansion tank filler cap.
Intercooler Flush
1.Remove intercooler.See FUEL SYSTEM,
Repair.
2.Flush intercooler element using Unicorn
Chemicals’C’Solve following the manufaturers
instructions.
3.Thoroughly dry intercooler ensuring that no trace
of solvent remains in the element.
4.Refit intercooler.See FUEL SYSTEM, Repair.AMBIENT AIR PRESSURE (AAP) SENSOR - Td5
1.Check ambient air pressure sensor for damage.
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12 - ENGINE
CONTENTS
Page
DESCRIPTION AND OPERATION
TD5 ENGINE 1........................................................................................................
GENERAL 12..........................................................................................................
CYLINDER BLOCK 13............................................................................................
CRANKSHAFT, SUMP AND OIL PUMP 22............................................................
CYLINDER HEAD COMPONENTS 25...................................................................
CAMSHAFT COVER COMPONENTS 30...............................................................
CAMSHAFT TIMING CHAIN COMPONENTS 30...................................................
CYLINDER BLOCK FLOW 32.................................................................................
OIL COOLER / FILTER FLOW 34...........................................................................
CYLINDER HEAD FLOW 36...................................................................................
ADJUSTMENT
ENGINE OIL PRESSURE CHECK 1......................................................................
REPAIR
CAMSHAFT 1.........................................................................................................
PULLEY - CRANKSHAFT 3....................................................................................
OIL SEAL - CRANKSHAFT - REAR 4.....................................................................
BEARING - SPIGOT - CRANKSHAFT 5.................................................................
GASKET - CYLINDER HEAD 6..............................................................................
ROCKER SHAFT ASSEMBLY 11...........................................................................
GASKET - COVER - CAMSHAFT 13......................................................................
ENGINE AND ANCILLARIES 14.............................................................................
MOUNTING - FRONT - LH 19................................................................................
MOUNTING - FRONT - RH 20................................................................................
MOUNTING - GEARBOX - REAR - LH 21..............................................................
MOUNTING - GEARBOX - REAR - RH 22.............................................................
FLYWHEEL 22........................................................................................................
FILTER - OIL 23......................................................................................................
STRAINER - OIL PICK-UP 24.................................................................................
PUMP - OIL 24........................................................................................................
GASKET - ENGINE TO SUMP 26..........................................................................
SWITCH - OIL PRESSURE 28...............................................................................
VALVE - RELIEF - OIL PRESSURE 29..................................................................
COOLER - ENGINE OIL 29....................................................................................
CENTRIFUGE ASSEMBLY 30................................................................................
ROTOR - CENTRIFUGE 32....................................................................................
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ENGINE
13
DESCRIPTION AND OPERATION CYLINDER BLOCK
The cylinders and crankcase are contained in a single cast iron construction. The cylinders are direct bored and
plateau honed with lubrication oil supplied via lubrication jets for piston and gudgeon pin lubrication and cooling. It
is not possible to rebore the cylinder block if the cylinders become worn or damaged. Three metal core plugs are
fitted to the three centre cylinders on the right hand side of the cylinder block.
Lubrication oil is distributed throughout the block via the main oil gallery to critical moving parts through channels
bored in the block which divert oil to the main and big-end bearings via oil holes machined into the crankshaft. Oil
is also supplied from the cylinder block main gallery to the five lubrication jets which cool and lubricate the piston
and gudgeon pins. Plugs are used to seal both ends of the main oil gallery at front and rear of the engine block.
An oil cooler is fitted to the LH side of the engine block; ports in the oil cooler assembly mate with ports in the
cylinder block to facilitate coolant flow. Oil is diverted through the oil cooler, centrifuge filter and full-flow filter
before supplying the main oil gallery. A tapping in the oil filter housing provides a lubrication source for the
turbocharger bearings and an oil pressure switch is included in a tapping in the oil cooler housing which
determines whether sufficient oil pressure is available to provide engine lubrication and cooling.
Cylinder cooling is achieved by water circulating through chambers in the engine block casting. A threaded coolant
jacket plug is located at the front RH side of the cylinder block.
Cast brackets are bolted to both sides of the engine block for mounting the engine to the chassis on the LH and
RH hydramount studs.
The gearbox bolts directly to the engine block; a gearbox shim plate is located between the adjoining faces of the
gearbox and the flywheel side of the engine block and is fixed to the rear of the engine block by two bolts. Two
hollow metal dowels locate the rear of the cylinder block to the shim plate. The gearbox casing provides the
mounting for the starter motor.
A port is included at the rear left hand side of the cylinder block which connects to the turbocharger oil drain pipe
to return lubrication oil to the sump. A plug sealing the lubrication cross-drilling gallery is located at the front right
hand side of the cylinder block and plugs for the main lubrication gallery are located at the front and rear of the
cylinder block. Two plastic dowels are used to locate the cylinder head to the cylinder block and must be replaced
every time the cylinder head is removed from the cylinder block.
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ENGINE
17
DESCRIPTION AND OPERATION The engine oil cooler assembly is located on the left hand side of the engine block behind the oil centrifuge and oil
filter. The housing is bolted to the engine block by seven bolts. A matrix is included in the oil cooler housing which
acts as a heat exchanger. Coolant flow circulates through the oil cooler housing under pressure from the coolant
pump and distributes the flow evenly around the matrix fins and then along the block into three core holes for
cylinder cooling. Coolant enters the oil cooler through a pipe with a rubber hose extension at the rear side of the
engine. The coolant hose is attached to the stub pipe of the oil cooler by a spring clip.
Oil, drawn from the sump by the oil pump, passes through the oil cooler via the cylinder block. The flow of coolant
around the exterior surface of the oil cooler matrix cools a proportion of the engine oil flow as it passes through the
oil cooler.
The oil cooler is sealed to the cylinder block by a gasket which must be replaced every time the oil cooler housing
is removed.
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12ENGINE
18
DESCRIPTION AND OPERATION Oil filters
The Td5 engine features two types of oil filter; the main filter is a standard disposable cartridge-type full flow oil
filter which is augmented with a by-pass centrifuge filter used to filter out particulate matter having a smaller
diameter smaller than 15 micron but greater than 3 micron.
1.Centre spindle
2.Spindle oil holes (2 off)
3.Centrifuge filter housing
4.Centrifuge filter drain pipe
5.Port - centrifuge filter drain pipe to sump6.Filter rotor
7.Internal seal
8.Cover
9.Cover screws (2 off)
The centrifuge filter is located on the left hand side of the engine block by the exhaust manifold and is housed in a
pot which is bolted to the oil cooler housing by means of three bolts. The pot contains a rotor located on a central
spindle which spins at up to 15,000 rev/min when oil is flowing through the unit under pressure. The rotor contains
two fine holes drilled at obtuse angles which cause the rotor to spin about the centre spindle when high pressure
oil is passing through it. The inner surface of the rotor captures carbon deposits and small particulate matter as it
is thrown outwards under centrifugal force to form a sludge on the inner walls of the rotor. The unit is able to trap
very fine impurities that build up in the oil that would be too small to filter using the normal paper-element type
full-flow filters alone.
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